Refrigeration & Air-Conditioning Practice Set-3

May 18, 2021

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1. Freon group of refrigerants are

2. The freezing point of sulphur dioxide is

3. Most thermostatic expansion valves are set for a superheat of

4. The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

5. A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

6. The curved lines on a psychrometric chart indicates

7. In a refrigeration system, the expansion device is connected between the

8. When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be

9. Critical temperature is the temperature above which

10. The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.


 

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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